Machine for sharpening pencils.



L MYERS.

MACHINE FOR SHARPENING PENCILS.

APPLlcATloN FILED MAR.,9. 1915.

l ,QUAU Pawn-ted Nov. 28, 1916.

2 SHEETS-SHEET l.

L. MYERS.

MACHINE FOR SHARPENING PENCILS.

' APPLICATION FILED MAR.9.1915.

l QU Patented Nov. 28, 1916.

2 SHEETS-SHEET 2.

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-particula rly described.

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Specicaton of vLetters Patent.

MACHINE FOR SHARPENING PENCIJLS.

Original application filed December 22, 1913, Serial 110.308,14?. Divided and this application lerl 'March TQ all whom it may Concern Be it known that I, Louis MYERS, a citizen of the United States, residing atlthe borough of Brooklyn, county of Kings, city and State of New York, have invented certain new and useful improvements in Machines for Sharpening Pencils, of which the following is a full, clear, and exact description.

My invention relates to improvements in machines for sharpening pencils and has for its object to provide in such a machine a clutch which is actuated by a reverse movement of the operating handle.

llt further has for its object to provide in such a machine a clutch which is withdrawn from the cutters by a reverse movement of the operating handle.

lt further has for its object to provide a clutch which is both withdrawn and opened upon a reverse movement of the operating handle.

The following is a description of an embodiment of my invention reference being had to the accompanying drawings in \vl1ich l `igure t shows a view of a pencil sharpener partly in side elevation and partly in section on line 1 1, Fig. 4. Fig. 2 shows a section of the same on the line 2 2, Fig. 1.

Fig. 3 shows a vertical section of portions.

of the standard and clutch on line 3 3, Fig. 4.. Fig. 4 shows a plan view of the pencil Sharpener. Fig. 5 shows a section on the line 5 5, Fig. 1. Fig. 6 shows a section of the clutch on the line 6 6, Fig. 5. Fig. 7 shows a section of the cutters on the line 7 7, Fig. 1.

Referring more particularly to the drawings, the main frame consists of a vertical hollow standard 1, base 2, an upper table or@ plate 18, and an arm 8 projecting laterally from the frame. rllhis arm 8, together with the upper table 18, forms bearings for a revolving milling device hereinafter more The pencil indicated at P is guided and held by clamping means irmly against ro- `lation. Slidably mounted in the hollow standard 1 of the frame is a hollow rod 22 (see Fig. 3) supporting at itsupper end a horizontal plate 21. This plate has a central orifice thro-ugh which the pencil is adapted to extend, and at each side of this orifice is mounted a sliding clamping jaw Serial No. 13,163. i

- 31 for gripping the pencil (seeiFig. 5).

rammen Env. ee, raie.y

member 27. It will be noted that the slots 29 in the operating member 27 are diagonally arranged with respect -to the clamping jaws 31 so as to act as cams upon the pins 30 of 'said jaws, when the member 27 is moved back and forth'. .'llhe operating member 27 is provided with a thumb-piece 28 projecting 'laterally from the side of the plate 21 to be engaged by the thumb of the operator. A spring 32 (see Fig. 1) is connected with the plate 27 to normally hold it in position for closing the clamping jaws 31. Referring .more particularly to Figs. 3 and 5, it will be seen that the rear end of the operating member 27 is provided with a slotted orifice having beveled wallsy 27. Extending through this orifice is a rod 24C having an upper beveled 4head 25 for cooperative engagement with the beveled walls 27 The rod 24 extends out through standard 1. The rod 22 is provided at one side with a toothed rack 2 3 (Figs. 1 and 2) which is adapted to engage a pinion 19,

loosely mounted on the main operating shaft 6 of the machine. The operating shaft 6, as shown, has fixed thereto at one end the usual handle 7, and at the other end a bevel gear 5. A spring-pressed pawl l20 is carried on the bevel gear 5 for engaging the teeth of pinion 19. When the shaft 6 is rotated in its right-hand direction, the pawl 2O rides idly over the pinion 19 without operating the same, but when the handle 7 is reversed pinion 19 is carried therewith, and by its engagement with rack 23 elevates the plate 21. When plate 21 has been elevated far enough to bring nut 26 against shoulder 50 of standard 1 (see Fig. 3), the further elevation of plate 21 causes a coaction between the beveled head 25 and beveled walls '27', so that plate 27 is moved against its back in position and clamp the pencil tightly.

The pencil is now ready to be sharpened by the operationof vthe milling device, which.,

-will now be described.

Referring first to Fig. 1, a carrier 3 1s revolubl mounted between table 18 and arm 8 with itsv upper hollow hub 9 1n a bear- .ingof,tabl`e. 18, and its lower hub 51 upon bearing post 10. Thecarrier 3 1s provided with abevel` gear 4 meshing with the operating bevel gear 5. Mountedon the carrier for independent rotation thereon are one, or more milling cutters 11 with their axes,

disposed at an angle to the axis of rotation f the carrier'ly and ofthe pencil axis P.'

These milling cutters have bevel gears 16 meshing with a' circular rack 17 ixed upon the upper table 18, whereby when the milling in the present modification are partly cylin- Y' the pencil. Each milling cutter has its milldrical and partly tapered like the frustum of a cone and h ve peripheral cutting teeth spirally arranged thereon for acting upon ing surface arranged at one portion at a different angle relative to its axis than at another portion, whereby two different an'- gles of cut will be obtained upon the pencil. For instance in Fig. l the milling surface of cutter 11 is substantially parallel to its axis V,down to theipoint 12, but the lower portion 413 ofthe'milling surface is inclined or tapered. It' will be observed that vby this con# struction the pencil is cut toward the pointA C with a smaller angle relative to the pencil axis than at the body of the pencil C1. The advantage of this construction is that the pencil is cut withmuch more of the lead exposed for givin a longer and betterlpoint. i

lso by reason o the closer proximity and slightly slower movement of the milling cutting teeth on the lead of the pencil than on the body of the pencil, the lead is less liable to be broken than formerly.

This application is a division of my application Serial No. 808,147, filed December 22,1913.

As will be evident to those skilled in the art my invention permits of various modifications without departing from the spirit thereof or the scope of the appended claims.

What I claim is:

1. lIn a pencil sharpening machine or the 2. In a pencil sharpenin machine or the like, a millingy device, han -operated means for actuating said milling device with a planetary movement about the axis of said pencil, non-rotatable pencil-clamping means arranged to be moved toward and away from `said milling device,.and lmeans actuated by said hand-operated means for movingl said clamping means away from said milling device said clamping normally tending to move toward said milling devlce.

3. Ina pencil sharpenin machine or the like, a milling device, han -o erated means for actuating said milling evice with a planetary movement about the axis of said pencil, when moved in a forward direction, non-rotatable pencil-clamping' means arranged to be moved toward and away from said milling device, and means actuated by said hand-operated means when moved in the reverse direction for moving said clamping means away from said mllling device, said clamping means normally tending to move toward said milling device.`

4. In a pencil sharpenm machine or the like, a milling device, han -operated means for actuating said milling device with a planetary movement about the axis oi' said pencil when moved in a forward direction,

non-rotatable pencil-clamping means normally in clamping position and arranged to be moved toward and away from said milli ing device, and means actuated by said handoperated means for moving said pencilclamping means away from said milling device and unclamping said pencil-clamping means, said clamping means normally tending to move toward said milling device.

5. In a pencil sharpenin machine or the like, a milling device, han -operated means for actuating said milling device with a planetary movement about the axis of said pencil, non-rotatable pencil clamping means normally in pencil clamping position, means for unclamplng said pencil ,clamping means, and a pawl connected to said hand-operated means and actuating said unclamping means when said hand-operating means is moved in a reverse direction.

LOUIS MYERS.

Witnesses? H. B. BnowNELL, HnnnERsoN F. HILL.

tt is hereby certied that in Lettere Patent No. 1,206,460, grented November 2.8, 1916, upon the application otv Louis Myers, of Brooklyn, New York, toren mprovement in Machines for Sharpening Penci1s," an error eppears in the printed epeeiceton requiring correction es follows: Page 2,*1ine 78, cum 2, efter the Word clamping insert theword means; and that the said Letters Patent should A be reed with this correction therein that the samel mey conform to the record of theeese in the Patent Dce.

Signed endl seeled this 26th dey'of December, A. D., 1916.

R. F. WHITEHEAD,

` Acting Uommtertonar of Patente.

[SML] on. 12o-e6. 

